Fénképfelvétel

Fénképfelvétel, often translated as light field photography or plenoptic imaging, is a photographic technique that captures not only the intensity and color of light but also its direction. Unlike traditional cameras that record a single 2D image, a light field camera captures a 4D dataset representing the light rays passing through the camera's aperture. This additional directional information allows for unique post-capture manipulations.

The core principle involves using a microlens array placed in front of the image sensor. Each microlens focuses a small portion of the scene onto a specific area of the sensor. By analyzing the images captured by these individual microlenses, the camera can reconstruct the direction of light rays.

One of the most significant advantages of fénképfelvétel is the ability to refocus an image after it has been taken. By computationally shifting the perspective from which different microlenses view the scene, the focal plane can be adjusted, allowing the user to select different areas of the image to be sharp. Additionally, fénképfelvétel can enable depth estimation, allowing for the creation of 3D representations of the scene. It also offers the possibility of changing the perspective of the image slightly. While still a developing technology, fénképfelvétel has found applications in areas such as computational photography, virtual and augmented reality, and scientific imaging.